[7.x] Synchronize processInStream.close() call #50581
Merged
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Due to https://bugs.openjdk.java.net/browse/JDK-8054565 the
FilterOutputStream
cannot be closed twice in Java 8.This PR is a workaround for this issue. It needs to be merged only to 7.x branch as in master we use Java 9 which contains the proper fix.
It also unmutes
testStopAndRestart
test case that was suffering from the underlying issue.Relates #49680